# Software Engineer
**Role:** Software Engineer · **Level:** IC1
**Company:** [Roblox](https://scaleengineer.com/companies/roblox)
**Difficulty:** Medium
**Salary:** US$85000 - US$110000
**Experience:** 0 - 2
**Timeline:** ~14 days
The Software Engineer IC1 interview at Roblox is designed to assess foundational programming skills, problem-solving abilities, and cultural fit for early-career engineers. It emphasizes core computer science concepts and the candidate's potential to grow within the company.
Canonical: https://scaleengineer.com/interviews/roblox/ic1-software-engineer
---
## Overall evaluation

- Technical Skills
- Behavioral and Cultural Fit

## Questions asked

- Write a function to reverse a string.
- Given an array of integers, find the two numbers that add up to a specific target.
- Explain the difference between a process and a thread.
- Tell me about a time you failed and what you learned from it.
- Why are you interested in working at Roblox?
- How would you approach debugging a performance issue in a web application?

## Preparation tips

### lists

- Review fundamental data structures (arrays, linked lists, trees, hash maps) and algorithms (sorting, searching, graph traversal).
- Practice coding problems on platforms like LeetCode, HackerRank, or Coderbyte, focusing on Easy and Medium difficulty.
- Understand basic object-oriented programming (OOP) concepts.
- Prepare to discuss your past projects and experiences, highlighting your contributions and learnings.
- Research Roblox's mission, values, and recent news.
- Familiarize yourself with the Roblox platform, especially if applying for a remote role.
- Practice explaining your thought process clearly and concisely.

### studyPlan

- {"title":"Data Structures Fundamentals","longDescription":"Weeks 1-2: Focus on core data structures like arrays, linked lists, stacks, queues, and hash maps. Practice implementing them and solving problems involving their use. Understand time and space complexity (Big O notation).","shortDescription":"Weeks 1-2: Data Structures (Arrays, Linked Lists, Stacks, Queues, Hash Maps) & Big O."}
- {"title":"Algorithm Practice","longDescription":"Weeks 3-4: Dive into algorithms such as sorting (bubble, merge, quick), searching (binary search), and basic graph traversal (BFS, DFS). Practice applying these algorithms to solve problems.","shortDescription":"Weeks 3-4: Algorithms (Sorting, Searching, Graph Traversal) & Problem Solving."}
- {"title":"Object-Oriented Programming","longDescription":"Week 5: Review Object-Oriented Programming (OOP) principles (encapsulation, inheritance, polymorphism, abstraction). Understand how to apply these concepts in code. Prepare to discuss OOP in your projects.","shortDescription":"Week 5: Object-Oriented Programming (OOP) Concepts."}
- {"title":"Behavioral Preparation","longDescription":"Week 6: Focus on behavioral questions. Prepare STAR method (Situation, Task, Action, Result) answers for common questions about teamwork, problem-solving, challenges, and learning experiences. Research Roblox's culture and values.","shortDescription":"Week 6: Behavioral Questions (STAR method) & Roblox Culture."}

## Location differences

- {"location":"San Mateo, CA","differences":{"tips":["Research local tech meetups and communities.","Understand the specific industry focus of the Roblox office in this region."],"interviewFocus":["Adaptability to local tech scene trends.","Understanding of regional market expectations for junior roles."],"commonQuestions":["Describe a challenging bug you fixed and how you approached it.","How do you stay updated with new technologies?","Tell me about a time you had to work with a difficult teammate."]}}
- {"location":"Remote","differences":{"tips":["Spend time playing and analyzing popular Roblox games.","Familiarize yourself with Roblox Studio and Lua scripting basics.","Be prepared to discuss your favorite features or aspects of the Roblox platform."],"interviewFocus":["Familiarity with the Roblox platform and its ecosystem.","Understanding of game development principles.","Core programming fundamentals."],"commonQuestions":["How would you design a simple game mechanic in Roblox?","What are your favorite Roblox games and why?","Explain the concept of object-oriented programming."]}}

## Round 1: Coding Challenge
**Type:** Technical Interview (Coding) · **Difficulty:** Medium · **Duration:** 45 min
Solve coding problems focusing on data structures and algorithms.
This round focuses on assessing your core programming skills. You will be asked to solve one or two coding problems, typically involving data structures and algorithms. The interviewer will evaluate how you approach the problem, your coding style, efficiency, and your ability to communicate your thought process.
**Interviewers look for:** Clear and logical thinking.; Ability to translate a problem into code.; Understanding of basic data structures and algorithms.; Ability to explain their solution and trade-offs.
**Evaluation criteria:** Problem-solving approach; Coding proficiency; Understanding of time and space complexity; Communication of thought process
**Common rejection reasons:** Inability to articulate thought process.; Poor understanding of fundamental data structures/algorithms.; Code contains significant bugs or is highly inefficient.; Lack of clarity in communication.
## Questions

- Given an array of integers, return indices of the two numbers such that they add up to target.
- Implement a function to check if a binary tree is a Binary Search Tree (BST).

## Preparation tips

- Practice coding on a whiteboard or a shared editor.
- Think out loud as you solve the problem.
- Ask clarifying questions if the problem statement is unclear.
- Consider edge cases and test your solution mentally.

## Round 2: Behavioral & Fit Interview
**Type:** Behavioral and Managerial Interview · **Difficulty:** Medium · **Duration:** 45 min
Discuss past experiences, teamwork, and motivation.
This round focuses on your behavioral and cultural fit. You'll be asked questions about your past experiences, how you handle different situations (e.g., conflict, failure, success), and your motivations for joining Roblox. The goal is to understand how you work with others and if you align with the company's values.
**Interviewers look for:** Evidence of collaboration and positive team interactions.; Ability to learn from mistakes and challenges.; Passion for gaming and the Roblox platform.; Cultural alignment with Roblox's values.
**Evaluation criteria:** Teamwork and collaboration skills; Problem-solving approach in past experiences; Adaptability and learning mindset; Motivation and alignment with Roblox values
**Common rejection reasons:** Lack of enthusiasm or interest in Roblox.; Poor fit with team culture.; Inability to provide specific examples for behavioral questions.; Negative attitude or lack of self-awareness.
## Questions

- Tell me about a time you had a disagreement with a teammate. How did you resolve it?
- Describe a project you are particularly proud of and your role in it.
- How do you handle receiving constructive criticism?

## Preparation tips

- Prepare specific examples using the STAR method.
- Research Roblox's company culture and values.
- Think about why you want to work at Roblox specifically.
- Be ready to discuss your strengths and weaknesses honestly.